Why Our Class A GU10 2.9W Bulb Outperforms Any Class F GU10: Savings, Efficiency & Payback Explained

When customers look for a GU10 spotlight, they often compare only the price tag. But focusing solely on the unit cost can be misleading. The real question is:

Which bulb costs less over its entire lifetime?

This is where our Class A GU10 2.9W clearly outshines a standard Class F GU10—not just in efficiency, but in total savings.

1. Energy Efficiency: Class A vs. Class F — What’s the Real Difference?

Typical specifications:

2. Yearly Energy Cost Comparison

For the calculation, we will assume that the electricity price is 0.3€/ kWh (average price in Europe). Also we will input that the bulb is used 8h per day, 7 days a week.

Here is the formula to calculate the yearly energy cost of each bulbs:

Bulb consumption in kWh * energy cost * time used during the whole year

Our GY Class A:

0.0029*0.3*8h*365days = 2.5404 €/years

Class F:

0.0055*0.3*8h*365days = 4.818 €/years

In one year, by choosing our Class A GU10bub, you will save 4.818 - 2.5404 = 2.277 €

3. Payback: How fast is the initial price difference covered ?

Because of a better concepted product, the initial upfront cost of our Class A bulb is higher than a Class F bulb.

Class A = 2.99 €/unit

Class F = 1.33 €/unit

The initial cost difference is 2.99 - 1.33 = 1.66 €/unit

However, you will covered this initial cost in less than a year. Here is the payback formula:

Initial price difference ÷ yearly energy savings -> 1.66 / 2.2776 = less than 9 months

Yes, our product is initially more expensive, nervetheless you will cover this initial cost within the first year of use !

4. Total savings over the lifespan of the bulb

Now let’s calculate how much you will save by choosing our Class A GU10 bulb during its whole lifespan. For the record, our product lasts 50,000 hours on average compared to 25,000 hours for a Class F, that is two time more !

For the calculation, we will use again 8h of use everyday of the year (2920h/year)

Total saving Class A = 50,000 * 2.5404 / 2920 = 41.16€

Total saving Class F = 25,000 * 4.818 / 2920 = 41.25€ but you need to multiply by 2 since its lifetime is twice less, so 82.50€.

The total saving for our Class A GU10 is more than 40€ per unit for 50,000 hours of usage (around 17 years), so around twice less than the Class F bulb. Furthermore, we didn’t add the cost of a new Class F replacement and the hassle of changing again your bulb.

5. Conclusion

Choosing our Class A GU10 2.9W means:

✔ lower energy bills
✔ payback in less than one year
✔ more than 40€ saved per bulb during its life
✔ double the lifespan of a Class F bulb
✔ fewer replacements, less waste, less hassle

Whether you use 3 bulbs in your kitchen or 20 in your office, the savings multiply fast.
So—what are you waiting for? Start saving today.